Why is air so important for us and don't put because we will die i need four answers

What information does a complete ionic equation give that the balanced equation doesn’t show?

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

If you used the method of initial rates to obtain the order for no2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 m, 0.100 m, & 0.050 m no2.